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Formaldehyde on Rt-U-BOND

Peaks

1.

Air

2.

Carbon dioxide

3.

Formaldehyde

4.

Water

5.

Methanol

GC_CH01137

Column

Rt-U-BOND, 30 m, 0.53 mm ID, 20 µm (cat.# 19750)

Sample

Formaldehyde (manual headspace)

Injection

Inj. Vol.:

10 µL split (split ratio 10:1)

Liner:

2 mm split Precision liner w/wool (cat.# 20823)

Inj. Temp.:

200 °C

Split Vent Flow Rate:

40 mL/min

Oven

Oven Temp.:

100 °C (hold 1 min) to 150 °C at 25 °C/min (hold 3 min)

Carrier Gas

He, constant pressure (7.7 psi, 53.1 kPa)

Linear Velocity:

39 cm/sec @ 100 °C

Detector

TCD @ 200 °C

Make-up Gas Type:

He

Data Rate:

20 Hz

Sensitivity Mode:

He/H2

Instrument

HP5890 GC

Notes

Sample Preparation: 10μl of formaldehyde solution added to a 20ml vial and heated to 60°C with CO2 added to the headspace. The formaldehyde solution is at a nominal concentration of 37% by weight with 10 to 15% methanol and the remaining amount water to stabilize the formaldehyde.

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